Oil-burner



C. A. HART.

OIL BURNER.

APvLlcAloN FILED DEc,13, 1919.

Patented July 13, 1920.

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CUI lio 1 l1.1 c 1A @MMM @Affidati @.Ffftfla..

CHARLES A. HART, 0F SEATTLE, WASHINGTN.

OIL-BURNER.

Specification of'Letters Patent.

Patented July 13, 1920.

Application filed December 13, 1919. Serial No. 344,702.

To @ZZ whom t may concern Be it known that I, CHARLES A. HART, a citizen of the United States, residing at Seattle, in the county of King and State of lVashington, have invented a certain new and useful Improvement in Oil-Burners, of which the following is aspeciiication.

lilly invention relates to improvements in oil burners of the type that are adapted to burn hydro-carbon oils as kerosene and the object of my invention is to provide an oil burner that is inexpensive and simple in its plan of construction and Vthat is eflicient and reliable in operation.

Another object is to provide an oil burner in which the fuel conduit may be made fromV an ordinary piece of pipe bent to the desired shape and be supported above a cast base by a new and novel form of supporting means.

A further object is to provide an oil burner in which the fuel conduit or pipe is disposed. and arranged in such manner that it will be heated by the flame of the burner sufliciently to gasify the fuel but will not be subjected to heat that is intense enough to cause the pipe to deteriorate rapidly.

A still further object is to provide an oil burner that is adapted to be placed in the dre-box and rest upon the grate of a stove and that has the fuel conduit pipe so arranged that both ends of such pipe project downwardly through the stove grate, one of such ends being connected with a fuel inlet pipe and the other of such ends having; a removable cap thereon and serving as a trap in which residue from the fuel may collect.v

rlfhe invention consists in the novel construction, adaptation and combination of parts of an oil burner as will be more clearly hereinafter described and claimed.

In the accompanying drawings I aeconiplish the above objects and whereinh Figure '1 is a plan view of an oil burner constructed in accordance with my invention;

Fig. 2 is a. view in vertical section on broken line 2, 2, of Fis?. l7 a portion of a grate on which the oil burner may rest being shown inelevation;

Fig. 3 is a view in cross-section on broken line 3, 3 of Fig. 2; and

Fig. i is an enlarged view in cross-section vof the burner pipe on broken line 4, a of Fig. 2.

Referring` to the drawings, throughout which like reference numerals indicate like parts, the numeral 5 designates a base that is substantially plane and flat except that it is provided in its central portion with a hollow raised burner support 6 having` four converoent walls that forni a truncated pyramid that is open at its top end as at 7. Two oppositely disposed walls of the truncated portion 6 are notched or orooved as at 8 to afford a rest for the lower portion of a burner pipe as more clearly hereinafter 'described.

The bottom side of the base 5 is plane and flat except that it is preferably provided around its outer edges with a rib 11 that gives strength to such base and that rests upon a grate 19. when the burner is placed in the lire-box of a stove.

The base plate 5 is provided with a medially arranged slot 9 that extends inwardly from one end of the base plate to the edge of the truncated portion 6 and affords an opening through which the burner conduit or pipe may pass.

The burner conduit is preferably formed of a single piece of pipe and comprises an upright portion 13, an upper horizontal porY tion 14, a curved end portion 15, a lower horizontal portion 16 that rests within the notches S in the truncated portion 6, and a downwardly proiectino dead end portion 17 that is provided with a removable cap 18.

The upright portion 13 extends from below the grate 11 upwardly through the slot 9 and is secured to the base 5 by two nuts 2O and 21. that are screwed on to the upright portion 13 and may be tightened against the top and bottom sides respectively of the base 5. The end 17 is bent so that it will project downwardly through the slot S) adjacent the base of the truncated portion 6 and serves as a trap to catch residue from the oil that will not gasify. The end 17 may lie easily cleaned out by removing` the cap 18.

The end of the upright portion 153 of the burner pipe is connected with a fuel supply pipe 22 through which fuel oil may he introduced either by .gravity or under pressure.

The upright portion 13 of the burner pipe is packed full of wires 23 of relatively small diameter, as V shown in Fig. il, that are inserted from the open bottom end and that serve both as a screen and as a heatretaining medium, the fuel being obliged to pass upwardly through the small spaces formed between the wires.

The lower horizontaljsection 16 of the burner pipe is provided on its top side and at a point substantially on the central axis of the truncated portion '6 with a relatively small perforation 24 from which fuel in liquid or gasiiied form may be emitted. V

If desired a flame detlector in the form of a disk may be suspended from the horizontal upper section 14 of the burner pipe for the purpose of spreading the flame produced by the gas that is emitted from the perforation 24, such deflector also serving to prevent a jet of gas from impinging directly on the pipe 14. i

fn starting the burner it will be necessary to permit some liquid fuel to flow from the perforation 24. andto run over the burner base where such liquid fuel may be ignited and thus serve to heat the burner pipe. As soon as the burner pipe becomes hot the fuel therein will be gasilied and the gas will be emitted fromA the perforation 24 and will unite with air and burn in the usual manner making a hot flame that is practically free from soot and smoke.

Air is emitted through the truncated portion G and is directed inwardly by the convergent walls thereof toward the central jet of gas in a manner best adapted to secure efficient combustion and produce a hot flame.

In experimenting with burners l have found that where the pipe is coiled so that a considerable length of pipe is subjected to the greatest heat of the burner such pipe will be heated to a white heat when the burner is in use and will deteriorate rapidly.

The burner disclosed herein is made from a-relatively short length of pipe which simply passes through the area of the most intense heat and which is arranged and disposed so that no part thereof is heated to a white heat which will cause the pipe to deteriorate rapidly and yet the heat is sufficient to gasify the fuel before it is emitted from the perforation 24.

After the burner has been lighted the gasified fuel in the burner pipe will hold the liquid oil so that it cannot feed too fast.

Obviously changes may be made in the form, dimensions and arrangement of parts of my invention without departing from the spirit thereof.

VWhat I claim is:

1. An oil burner comprising a fiatkbase having a slot extending from one end thereof inwardly andprovided with a hollow portion of truncated pyramidal shape that projects above the upper' surface thereof saidY hollow truncated portion being open at its top end and havin-gtwo of its oppositely disposed walls notched from the top downwardly, and a burner pipe comprising a U- shaped coil arranged in a vertical plane with its lowermost side resting in said notches and its two ends bent downwardly and proj jee-ting through the slot in said base, the lowermost side of said U-shaped coil having an upwardly directed gas outlet perforation located centrally of said hollow truncated portion.

2. An eil burner comprising a flat base the lowermost side of the U-shaped coil hav-V ing an upwardly directed gas outlay perforation located centrally of said hollow truncated portion, and a plurality of wires disposed within oneend of said burner pipe.

3. An oil burner comprising a flat base,

having a hollow portion of truncated py-` ramidal shapethat projects above the upper surface thereof, said hollow truncated.` portion being open Vat its top Vend and having two of its opposite walls notched in the longitudinal medial plane of said base, said base having a slot that extends from one end thereof inwardly to the edge of saidtruncated portion, a burner pipe comprising a vertically arranged closed end that projects upwardly through the slot in said base and is then bent at right angles to form a lower horizontal portion that rests within the notches in said truncated `portion and is provided with an upwardly directed gas outlet perforation, said horizontal por-tion then being bent double on a gradual -curve to form an upper horizontal portion that is 'spaced above and arranged parallel with said lower horizontal portion, the outer end of said upper horizontal portion being bent downwardly and projected through said slot, jam nuts on said downwardly bent portion and arranged -to be tightened against the opposite sides of said base to support said burner j pipe, and a plurality of wires disposed within the downwardlybent portion.

In'witness whereof I lhereunto subscribe my name this 8th day of December, A. D.

CHARLES A. HART. 

